Final Thoughts

If the exclusive attribute is set then the volume group will be activated exclusively through the use of the volume_list filter in lvm.conf. In the filter scenario, the LVM agent verifies that pacemaker’s configuration will result in the volume group only being active on a single node in the cluster and that the local node’s volume_list filter will prevent the volume group from activating outside of the resource agent.

On activation, this agent claims the volume group through the use of a unique tag and then overrides the volume_list field in a way that allows the volume group to be activated only by the agent.